Musical Oddity

I downloaded some free software that analyzes the audio files on your computer, and then groups the music according to measures of similarity.  One thing it estimates is the number of beats per minute, which is a useful feature for DJs working at dance clubs.   I noticed that it always set Gregorian Chant to the maximum value of 160 beats per minute, which tells me that chant does not have a rhythmic structure!  The software classified chant with audio lectures.